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View Full Version : how do i stop emitting particles in time and move camera



stephefrank
07-05-2014, 09:51 PM
hi guys,
could anyone guide me through how do i pause emitting particles in time and move camera around them (bullet time effect)?

Thanks

pinkmouse
07-06-2014, 02:29 AM
I don't believe you can, none of the appropriate controls have envelopes. You might be able to do something by saving the pfx file and editing it in Chronosculpt, but I don't have it so can't confirm. If you don't have too many particles, you might be able to do something in Bullet:


https://www.youtube.com/watch?v=QTxgMjHyzJE

...by enveloping the Time Scale, (under the World tab in the dynamics panel).

dpont
07-06-2014, 04:20 AM
You may try to rescan the emitter in another format,
like MDD or Maya Cache, then play it with a MDD Pointer or MC Emitter
with mapped Time in DP Motion Designer.

Denis.

prometheus
07-06-2014, 06:57 AM
Thereīs also an option to convert the particles(if you started with hv emitters that is) to partigons by the particle2partigon command, and you can save out the particles as freezed points with the save transformed command, so whatever frame you save out from, you will
get a 1point poly static cluster from that, or you could start with a partigon emitter instead of hv emitter so you skip the convert process.

partigons can be used as both 1point polyīs or used together with hypervoxels, with hypervoxels you would probably like to dissolve the rendering of the polys so you donīt get both.
The particle2partigon command is hidden, you have to search for it in your menu setups and add it to whatever menu you like, best is probably to start using a partigon emitter than hv emitter from start though.

Then you might be able to load that freezed cluster and have it start to be visible at the very frame you need the bullet time effect, and then simply dissolve the other main particle cluster at the very same frame.
Otherwise I think dpont gave a good advice.

Thomas Leitner
07-06-2014, 07:46 AM
hi guys,
could anyone guide me through how do i pause emitting particles in time and move camera around them (bullet time effect)?

Thanks

Hi,
maybe you can use the TimeWarp Modifier in the Motion panel of the camera.
But be warned: messing with time can destroy your brain!

ciao
Thomas

VIDandCGI
07-06-2014, 09:34 AM
I was going to suggest a similar solution to Prometheus, I believe also there was a plugin that saved out pfx to modeler. But I would use prometheus solution as it requires no plugin.

I did note however that when I went to search for the particle2partigon in the edit menu function, that the using partial string of particle - that there is no next instance button, instead you have to press search again then ok again.
Maybe something that could be useful to add - similar to say find next in PDF's.

JoePoe
07-06-2014, 11:15 AM
So, um.... a little confused here. :stumped:

Won't a simple envelope on velocity do this?

122818

stephefrank
07-06-2014, 01:37 PM
Thanks everyone for the help.. very usefull stuff :)

thanks

prometheus
07-06-2014, 02:59 PM
So, um.... a little confused here. :stumped:

Won't a simple envelope on velocity do this?

122818


Edit....
you might be right...I think, seems you would have to adjust weight and resistance maybe, since it donīt stop and freeze completly.

prometheus
07-06-2014, 03:10 PM
was testing some scanning and trying to get mddīs from the particles with no luck, not sure if the emitter specificly needs to have it set to emitt by frame and equal amount of particle limits as it is born per frame, since mdd I donīt think will work correctly on items with a changing point count.

Not sure if dpontīs suggestion would really work here?

dpont
07-07-2014, 12:11 AM
...since mdd I donīt think will work correctly on items with a changing point count...

The output object and MDD file have a point count
set to the maximum of particles emitted,
so limby particles stay at a default position,
you may also play the in the MDD Emitter directly.

For my usage I prefer the MC format,
multiple files format allows time mapping,
streaming is too complicated in one file,
with blocks varying in size (number of particles).

That's say if a particle scan doesn't work
with a specific emiiter, I could look at it.

Denis.

bazsa73
07-07-2014, 01:56 AM
Seems like a simple thing but it is not. Why on earth playback speed is not envelopable?